// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/bind.h"
#include "base/guid.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/message_window.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace base {

namespace {

    bool HandleMessage(
        UINT message, WPARAM wparam, LPARAM lparam, LRESULT* result)
    {
        // Return |wparam| as the result of WM_USER message.
        if (message == WM_USER) {
            *result = wparam;
            return true;
        }

        return false;
    }

} // namespace

// Checks that a window can be created.
TEST(MessageWindowTest, Create)
{
    win::MessageWindow window;
    EXPECT_TRUE(window.Create(base::Bind(&HandleMessage)));
}

// Checks that a named window can be created.
TEST(MessageWindowTest, CreateNamed)
{
    win::MessageWindow window;
    EXPECT_TRUE(window.CreateNamed(base::Bind(&HandleMessage),
        UTF8ToUTF16("test_message_window")));
}

// Verifies that the created window can receive messages.
TEST(MessageWindowTest, SendMessage)
{
    win::MessageWindow window;
    EXPECT_TRUE(window.Create(base::Bind(&HandleMessage)));

    EXPECT_EQ(SendMessage(window.hwnd(), WM_USER, 100, 0), 100);
}

// Verifies that a named window can be found by name.
TEST(MessageWindowTest, FindWindow)
{
    string16 name = UTF8ToUTF16(base::GenerateGUID());
    win::MessageWindow window;
    EXPECT_TRUE(window.CreateNamed(base::Bind(&HandleMessage), name));

    HWND hwnd = win::MessageWindow::FindWindow(name);
    EXPECT_TRUE(hwnd != NULL);
    EXPECT_EQ(SendMessage(hwnd, WM_USER, 200, 0), 200);
}

} // namespace base
